Table 3.
Correlation analysis between parameters on CoP displacement, levodopa equivalent daily dose, and UPDRS total score on Tinetti balance and gait score.
| Spearman correlation | Tinetti balance and gait score | ||
|---|---|---|---|
| r | p-value | Adjusted p-value† | |
| Age | −0.11 | 0.068 | 0.086 |
| Disease duration (years) | −0.05 | 0.024 | 0.035 |
| Levodopa equivalent daily dose (mg/day) | −0.402 | <0.0001 | 0.001 |
| UPDRS total score | −0.746 | <0.0001 | 0.001 |
| APA parameters on CoP displacement | |||
| APAs duration (s) | |||
| APA1 (s) | 0.11 | 0.26 | 0.297 |
| APA2a (s) | −0.448 | <0.0001 | 0.001 |
| APA2b (s) | −0.304 | 0.002 | 0.005 |
| LOC (s) | −4.02 | <0.0001 | 0.001 |
| APAs length (cm) | |||
| APA1 (cm) | 0.315 | 0.001 | 0.004 |
| APA2a (cm) | −0.05 | 0.61 | 0.61 |
| APA2b (cm) | 0.18 | 0.07 | 0.086 |
| LOC (cm) | 0.19 | 0.06 | 0.078 |
| APAs velocity (cm/s) | |||
| Mediolateral direction (X) | |||
| APA1 (X) (cm/s) | 0.294 | 0.003 | 0.006 |
| APA2a (X) (cm/s) | 0.325 | 0.001 | 0.003 |
| APA2b (X) (cm/s) | 0.246 | 0.013 | 0.021 |
| LOC (X) (cm/s) | 0.37 | <0.0001 | 0.001 |
| Anteroposterior direction (Z) | |||
| APA1 (Z) (cm/s) | 0.10 | 0.33 | 0.35 |
| APA2a (Z) (cm/s) | 0.252 | 0.011 | 0.02 |
| APA2b (Z) (cm/s) | 0.335 | 0.001 | 0.003 |
| LOC (Z) (cm/s) | 0.11 | 0.29 | 0.32 |
UPDRS, Unified Parkinson’s Disease Rating Scale; z = Track velocity (m/s) in the segments in the anteroposterior direction; x = Track velocity (m/s) in the segments and in the mediolateral direction; † = Adjusted p-value is calculated by Benjamini-Hochberg false discovery rate.